Christian polemicists used Muslim sources to prove Muhammad was a soothsayer

Evidence

Certainly these Muslim accounts of Muhammad’s revelations did circulate in Spain and were used to support some Christian theories. San Pedro thought that the same tradition from ‘A’ishah about the Prophet’s perspiring while he received a revelation showed that he was exactly what the Quraysh, his enemies among his own people in Mecca, accused him of being, a soothsayer. His choice of authorities was only a little less discriminating than his predecessor’s. — Norman Daniel, Islam and the West, 180

Categorization

• XREF: connects to: Muslims treated Muhammad’s illiteracy as proof of revelation, which Christians inverted; Christian polemicists read Muslim sources as unwittingly confirming Christian legends — Norman Daniel, Islam and the West, 1314; Christian critics adopted Muhammad’s Meccan enemies’ accusation of soothsaying (+1 more)